Regulation for passengers of surface public transport of the Entitat Metropolitana del Transport
General terms and rules of use of Ferrocarril Metropolità de Barcelona, SA
Law 7/2004, of 16 July
These articles establish the terms and fashion in which the penalty fare should be required and the subsequent measures should the amount not be paid in the established period. The articles are from 52 to 54, from chapter V, third section.